Knuckle down
Knuckle down verb - Work very hard, like a slave.
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Synonyms for Knuckle down
Submit and knuckle down are semantically related. In some cases you can use "Submit" instead a verb "Knuckle down".
Submit
Submit verb - To cease resistance (as to another's arguments, demands, or control).
Knuckle down and submit are semantically related. Sometimes you can replace term "Knuckle down" with "Submit", this verbs are similar.
Mutual synonyms
Cite this Source
Submit and Knuckle down. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/knuckle_down/submit
Knuckle down & Submit. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/knuckle_down/submit>.
Submit or Knuckle down. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/knuckle_down/submit.
Google Ngram Viewer shows how "knuckle down" and "submit" have occurred on timeline